JP2006211927A - Working vehicle for agriculture - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a working vehicle for agriculture with improved body balance in longitudinal direction of a body, facilitating downsizing of the body and improvement of operability. <P>SOLUTION: The working vehicle for agriculture is coupled with a working machine 4 on the rear part of the traveling body 1 and is equipped with a seat 45 for operator on a longitudinal center Pa of the body frame 64 of the traveling body 1. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an agricultural work vehicle in which a work device is connected to a rear portion of a traveling vehicle body.

In agricultural work vehicles such as those described above, the front and rear balance of the vehicle body can be improved by mounting a heavy engine or the like on the front end portion of the traveling vehicle body (for example, the engine mounting portion that extends largely forward from the front axle). It was made to plan (for example, refer patent document 1).
JP 2001-224209 A

  When an engine or the like is mounted on the front end portion of the traveling vehicle body as in the above-described prior art, the total length of the traveling vehicle body becomes longer as the mounting position of the engine is on the front side of the vehicle body, and a bonnet that covers the engine is used. Since the field part below the front before being hidden becomes wider and the driver's view of the field is narrowed, workability is reduced.

  An object of the present invention is to make it possible to reduce the size of a vehicle body and improve workability while improving the front-rear balance of the vehicle body.

  As means for solving the above-mentioned problems, in the invention according to claim 1 of the present invention, a working device is connected to the rear portion of the traveling vehicle body, and the driver's seat is placed on the front and rear center of the vehicle body frame in the traveling vehicle body. Has been deployed.

  According to this configuration, the weight of the driver sitting on the driver's seat is closer to the front than in the case where the driver's seat is deployed behind the front / rear center of the vehicle body frame, and the front / rear balance of the vehicle body is more effectively improved. Because the engine can be deployed with the engine close to the vehicle body (driver side), the overall length of the vehicle body can be shortened, and the front lower part hidden by the hood that covers the engine. This narrows the field portion of the driver and increases the field of view of the driver with respect to the field.

  Therefore, the vehicle body can be reduced in size and workability can be improved while improving the front-rear balance of the vehicle body.

  In the invention according to claim 2 of the present invention, the working device is connected to the rear portion of the traveling vehicle body, and the engine is arranged on the front and rear center of the vehicle body frame in the traveling vehicle body.

  According to this configuration, the overall length of the vehicle body can be shortened while the engine is used to improve the front-rear balance of the vehicle body, and the front and lower field portions that are hidden by a hood covering the engine are eliminated, so that the driver's view of the field can be reduced. Becomes wider.

  This is particularly effective in a farm work vehicle in which a lightweight work device is connected to the rear part of the traveling vehicle body.

  Therefore, the vehicle body can be reduced in size and workability can be improved while improving the front-rear balance of the vehicle body.

  In the invention according to claim 3 of the present invention, the working device is connected to the rear portion of the traveling vehicle body, and the extension seedling stand extends forward from the connecting portion connected to the traveling vehicle body. Preliminary seedling support frame is provided.

  According to this configuration, the weights of the extension part of the spare seedling support frame, the spare seedling stand installed in the extension part, the spare seedling placed on the spare seedling stand, etc. are effective in improving the front-rear balance of the vehicle body. Since the engine can be deployed in a state where the engine is moved to the rear side of the vehicle body (driver side), the overall length of the vehicle body can be shortened and the front and lower sides hidden by the hood covering the engine can be reduced. The field portion is narrowed, and the driver's view of the field is widened.

  Therefore, the vehicle body can be reduced in size and workability can be improved while improving the front-rear balance of the vehicle body.

  In the invention according to claim 4 of the present invention, a work device is connected to the rear part of the traveling vehicle body, and a transmission case is provided on the front and rear center of the entire vehicle body extending from the front end of the traveling vehicle body to the rear end of the work device. It is.

  According to this configuration, the transmission case can be used more effectively to improve the front-rear balance of the vehicle body compared to the case where the transmission case is deployed behind the front-rear center of the entire vehicle body. Can be deployed in a state where the vehicle is moved to the rear side (driver side) of the vehicle body, so that the overall length of the vehicle body can be shortened, and the front and lower farm field part hidden by the hood covering the engine is narrowed, The field of view becomes wider.

  Therefore, the vehicle body can be reduced in size and workability can be improved while improving the front-rear balance of the vehicle body.

  In the invention according to claim 5 of the present invention, the working device is connected to the rear portion of the traveling vehicle body, and a fuel tank is provided on the front and rear center of the entire vehicle body extending from the front end of the traveling vehicle body to the rear end of the working device. It is.

  According to this configuration, the weight of the fuel tank and the fuel inside the fuel tank and the fuel in the interior of the vehicle body can be effectively contributed to the improvement of the front / rear balance of the vehicle body, as compared with the case where the fuel tank is provided behind the front / rear center of the entire vehicle body. It is possible to deploy the engine in the state where the engine is moved to the rear side of the vehicle body (driver side), so that the overall length of the vehicle body can be shortened, and the field part in the front lower part hidden by the hood covering the engine is It becomes narrower and the driver's view of the field becomes wider.

  Therefore, the vehicle body can be reduced in size and workability can be improved while improving the front-rear balance of the vehicle body.

  In the invention according to claim 6 of the present invention, a working device is connected to the rear part of the traveling vehicle body, and a driver seat and an engine are arranged on the front and rear centers of the vehicle body frame in the traveling vehicle body, A spare seedling support frame equipped with a spare seedling stand is provided in an extending part extending forward from the connecting part to be connected, and on the front-rear center of the entire vehicle body extending from the front end of the traveling vehicle body to the rear end of the working device. Has deployed a mission case.

  According to this configuration, by arranging the engine on the front and rear center of the vehicle body frame in the traveling vehicle body, the overall length of the vehicle body can be shortened, and there is no front and lower field portion hidden by the hood covering the engine, so that The driver's field of view becomes wider.

  In addition, compared to the case where the driver's seat is arranged behind the front and rear center of the body frame, the weight of the driver sitting on the driver's seat becomes more forward, contributing to the improvement of the front / rear balance of the body more effectively. In addition, the engine can be used to improve the front-rear balance of the vehicle body, and further, the extension part of the spare seedling support frame, the spare seedling base equipped in the extension part, and the spare placed on the spare seedling base The weight of seedlings, etc. can be effectively contributed to improving the front / rear balance of the vehicle body, and in addition, the transmission case is compared to the case where the transmission case is deployed on the rear side of the front / rear center of the entire vehicle body. Can be used more effectively to improve the longitudinal balance of the vehicle body.

  Therefore, the front-rear balance of the vehicle body can be improved more effectively, and the vehicle body can be further reduced in size and workability can be further improved.

  In the invention according to claim 7 of the present invention, in the invention according to claim 1, 3, 4 or 5, it overlaps with the fuel tank in a plan view behind the front axle of the traveling vehicle body. The engine is deployed in a position that does not.

  According to this configuration, the overall length of the vehicle body can be shortened while the engine is used for improving the front-rear balance of the vehicle body, and the front and lower field portion hidden by the hood covering the engine is narrowed, so that the operation with respect to the field Person's field of view becomes wider.

  Further, it is possible to avoid an increase in the position of the center of gravity which occurs when a fuel tank is provided above the engine in order to ensure a water head difference between the fuel tank and the carburetor.

  Therefore, the front-rear balance of the vehicle body can be improved more effectively, the vehicle body can be further downsized and the workability can be further improved, and further, the deterioration of the vehicle body stability due to the rise of the center of gravity can be avoided.

  According to an eighth aspect of the present invention, in the invention according to any one of the first to seventh aspects, a guidance operation from the ground side of the traveling vehicle body is performed on a front end portion of the traveling vehicle body. The operation arm that makes it possible is fixed.

  According to this configuration, when traveling over the heel that causes the vehicle to travel with the driver getting off the ground, it is likely to occur when traveling over the heel by using an operation arm that is fixedly installed at the front end of the traveling body. It is possible to satisfactorily perform the pressing operation for suppressing the lifting of the front side of the vehicle body and the guidance operation for guiding the vehicle body to the left and right from the ground side.

  Moreover, since the operation arm is fixedly equipped, the vehicle body front side using the operation arm can be pulled up, so that the guidance operation with the front side of the vehicle body lifted up can be performed well. Furthermore, the strength required for these operations can be secured at a low cost with a relatively simple structure.

  In particular, in the case where the driver's seat is arranged on the front / rear center of the vehicle body frame in the traveling vehicle body, when traveling while the driver is seated on the driver's seat, a good front / rear balance in consideration of the weight of the driver can be obtained, In addition, during the guidance operation in which the driver uses the operation arm from the ground side to guide the vehicle body, the center of gravity of the vehicle body becomes moderately rearward as the driver leaves the driver's seat. It becomes easy to perform a guidance operation, particularly a guidance operation in which the front side of the vehicle body is lifted and made to feel like it is.

  Therefore, it is possible to satisfactorily perform a pressing operation and a guiding operation from the ground side of the vehicle body using the operation arm while simplifying the configuration and reducing the cost.

  FIG. 1 shows an overall side view of a riding type rice transplanter, which is an example of an agricultural work vehicle, and FIG. 2 shows an overall plan view thereof. Is provided with a link mechanism 3 that swings up and down by the operation of the lifting cylinder 2, and a seedling planting device (an example of a working device) 4 is connected to the rear end of the link mechanism 3, and Attaching device 4 is equipped to be driven up and down.

  As shown in FIGS. 1 to 5, the traveling vehicle body 1 includes a main frame 6 made of a pipe material facing front and rear with a front axle case 5 connected to the front end, and a transmission case connected to the rear end of the main frame 6. The air-cooled gasoline engine 8 is anti-vibrated and mounted in a tilted position with the crankcase side that is heavy and heavy in weight positioned forward, and the power from the engine 8 is applied to the belt tension. Is transmitted to a transmission (not shown) incorporated in the transmission case 7 via a main clutch 9 of the type so as to be able to be switched intermittently, and the driving power after shifting by the transmission is used for driving the front wheels 6 The front and rear transmission shaft 10 inserted through the front axle case 5, the bevel gear 11 and the lateral transmission shaft 12 built in the front axle case 5, and the left and right front wheels extending from the front axle case 5 to the left and right. 13 is transmitted to the left and right front wheels 14 at the same speed, and the left and right side clutches 15 built in the mission case 7 and the left and right side clutches extending from the mission case 7 to the left and right are used for driving the rear wheels. It is configured as a four-wheel drive type that transmits to the left and right rear wheels 17 via the rear axle 16 and the like so as to be able to be intermittently switched, and the working power after shifting by the transmission is output from the rear part of the transmission case 7.

  3 is a multi-plate brake that acts on the lateral transmission shaft 12, and this brake 18 is mechanically linked to an operation pedal 19 provided at the front right side of the traveling vehicle body 1 together with the main clutch 9. With this configuration, the operation of switching the main clutch 9 to the disengaged state and the operation of switching the brake 18 to the braking state can be performed by depressing the operation pedal 19.

  Further, the operation pedal 19 is integrally equipped with an operation lever 20 that extends toward the front of the traveling vehicle body 1. By using this operation lever 20, the main clutch 9 is disengaged even from the ground side. Switching operation to the braking state and the switching operation to the braking state of the brake 18 can be performed, and the vehicle body can be stopped.

  As shown in FIGS. 1 and 2, in the seedling planting device 4, the working power from the transmission case 7 is transmitted to the power distribution unit 22 through a working transmission shaft 21 configured to be extendable and contracted. The seedling mounting table 23 on which three mat-shaped seedlings are placed is reciprocated in the left-right direction with a predetermined stroke and distributed in a state spaced apart at a constant interval by the power distributed from the power distribution unit 22. Three installed crank-type planting mechanisms 24 cut out a predetermined amount of seedlings from the corresponding mat-like seedlings and plant them in the field mud, and each time the seedling mount 23 reaches the left and right stroke ends, Three vertical feed belts 25 arranged in parallel at a certain interval in the direction are configured so that up to three seedlings can be planted by vertically feeding the corresponding mat-like seedlings downward by a predetermined amount. Has been.

  Further, a leveling float 26 for leveling the field mud surface before planting with the traveling of the vehicle body is provided in a lower portion of the seedling planting device 4 in a state where pitching around the rear fulcrum is allowed.

  And although illustration is abbreviate | omitted, in this rice transplanter, the driving | running | working vehicle body 1 is controlled by controlling the action | operation of the raising / lowering cylinder 2 based on the pitching of the leveling float 26 accompanying the driving | running | working when the leveling float 26 is grounded. Regardless of the vertical movement of the seedlings, a height maintenance device is provided to maintain the seedling planting device 4 at a preset ground contact height, whereby an appropriate planting depth for seedling planting by the seedling planting device 4 is provided. Can be done stably.

  As shown in FIGS. 1 to 4, a cast support 27 having a function as a balance weight is connected to the front center of the front axle case 5, and the lower part of the steering shaft 28 is connected to the support 27. An opening 29 for insertion and support is formed, and a first cover 31 made of sheet metal is integrally provided with a handle post 30 that supports the steering shaft 28, and the support base 27 and the handle post 30 are provided on the first cover 31. A resin-made second cover 32 that covers the front from the front is detachably locked and connected, and the first cover 31 and the second cover 32 constitute a front cover 33.

  The steering shaft 28 is equipped with a steering wheel 34 at its upper end, and a pinion gear 35 integrally formed at its lower end meshes with a sector gear 36 pivotally supported by a support base 27, and the left and right ends of the sector gear 36 are The left and right front wheels 14 are connected to each other via tie rods 38 corresponding to left and right knuckle arms 37.

  The sector gear 36 is formed with a pair of left and right elongated holes 39 centered on the fulcrum, and the other ends of the left and right linkage rods 40 whose one ends are engaged with the elongated holes 39 correspond to the corresponding side clutches. 15 operation arms 41 are connected.

  That is, when the left and right front wheels 14 are steered in conjunction with the turning operation of the steering wheel 34, and when the front wheels 14 are steered more than a set angle from the straight travel position by the operation, the side with respect to the rear wheel 17 on the inside of the turn When the clutch 15 is switched to the disengaged state, a small turning state appears that turns in the three-wheel drive state in which the left and right front wheels 14 and the rear wheel 17 outside the turn are driven.

  1, 2, and 4 is a shift lever that is supported on the left portion of the first cover 31 and is operatively linked to the transmission, and reference numeral 43 in FIG. 2 is a driver seat 45. And an accelerator lever operatively linked to an accelerator device (not shown) of the engine 8.

  As shown in FIGS. 1, 2, and 5, a frame is formed so as to cover the upper portion of the mission case 7 and the engine 8 with a pair of left and right pipe members, etc., across the main frame 6 and the left and right rear ends of the mission case 7. The driver seat 45 is pin-coupled on the front front side of the seat frame 44 so as to be able to swing back and forth around the front connection fulcrum and adjust the position in the front-rear direction. Further, a fuel tank 46 is connected to the upper rear side of the seat frame 44.

  On the right side of the driver's seat 45, a control valve (not shown) for switching the operating state of the elevating cylinder 2 and an operation linked to a work clutch (not shown) for switching the transmission state to the seedling planting device 4 are operated. An operation lever 47 is provided, and by using the operation lever 47, the raising / lowering operation and the operation switching operation of the seedling planting device 4 from the sitting position can be performed. In addition, a sensitivity adjustment lever 48 that is operatively linked to the height maintenance device is provided on the right side of the fuel tank 46. By using this sensitivity adjustment lever 48, the height maintenance device can be controlled from the seating position. The sensitivity can be adjusted.

  As shown in FIGS. 1, 2, and 4 to 7, a sheet metal step 49 formed so as to cover the engine 8, the support base 27, and the like from above is attached / detached across the support base 27 and the seat frame 44. An opening 50 that exposes the front upper part of the engine 8 is formed at the center thereof, and a resin bonnet 51 that covers the opening 50 and the front upper part of the engine 8 is detachably associated. An opening 52 that exposes the fuel tank 46 is formed at the rear portion of the step 49, and the operation that is swing-operated to the seating posture is made between the two openings 50 and 52 in the step 47. A pair of left and right cushion springs 53 for receiving and supporting the rear portion of the seat 45 are provided, and further, the working lever 47 is swung back and forth at the right side of the opening 50 in step 49. Opening 54 to allow the work is also on the right side portion of the opening 52 in step 49, an opening 55 to allow the front and rear tilting operation of the sensitivity adjusting lever 48 are formed respectively.

  As shown in FIGS. 1, 2, 5, 7, and 8, a spare seedling support frame 57 that supports a spare seedling table 56 on which a spare seedling is placed is connected to the rear upper portion of the seat frame 44. The preliminary seedling support frame 57 extends from the both ends of the connecting portion 58 connected to the seat frame 44 to the front and from the both ends of the connecting portion 58 to the front, and further extends upward from the extending end. It is composed of a pipe material or the like bent so as to have a pair of left and right L-shaped extending portions 59 to be protruded, and two preliminary seedling stands 56 are vertically spaced apart from each other by an extension portion 59 on the left side thereof. A single preliminary seedling stand 56 is supported by the right extension 59.

  Each of the spare seedling stands 56 is configured to be switchable between a placement posture that extends laterally outward from the preliminary seedling support frame 57 and a retracted posture that stands up along the preliminary seedling support frame 57. 1 is arranged so as to be located on the lateral side of the driver seat 45 in FIG.

  Note that reference numeral 60 in FIG. 2 denotes a recoil knob for starting the engine disposed at the right front portion of the driver's seat 45 in step 49 in consideration of the lifting operability at the time of starting the engine. Further, in step 49, the left lateral side portion of the driver's seat 45 is formed on a flat surface that can be used as an auxiliary step for supplying spare seedlings to the seedling mounting base 23 of the seedling planting device 4. When refueling the fuel tank 46 disposed behind the driver's seat 45, the fuel tank 46 can be used as a temporary placement table for temporarily placing a replenishment tank (not shown).

  As shown in FIGS. 1 to 3 and FIG. 9, the support base 27 is fixedly equipped with an operation arm 61 that enables a guidance operation from the ground side of the traveling vehicle body 1. It is made of a pipe material that is bent in a U-shape and is substantially L-shaped in side view, and its length (width) W1 in the left-right direction is longer than the length (width) W2 in the left-right direction of the front cover 33. The front and rear sides of the front cover 33 are set so that the grip 62 is positioned in front of the support base 27 and the upper end of the grip 62 is positioned lower than the vertical middle position of the front cover 33. Both ends 63 of the direction are bolted to the corresponding side surface of the support base 27.

  In other words, in the case of traveling over the heel that causes the vehicle to travel with the driver getting off the ground, if the operating arm 61 fixed to the front end of the traveling vehicle body 1 is used, the vehicle body that is likely to occur during traveling over the heel. The pressing operation that suppresses the lifting of the front side and the guiding operation that guides the vehicle body to the left and right can be performed satisfactorily from the ground side.

  In addition, the operation arm 61 can be used for guidance operation of the vehicle body using the operation arm 61 even in a narrow path by fixing the operation arm 61 with the extension length relatively short. It can be performed well without causing inconvenience such as contact with an object, and the front side of the vehicle body can be lifted and lifted by enabling the operation of lifting the front side of the vehicle body using the operation arm 61. Guiding operations can be performed well, and the strength required for these operations can be secured at a low cost with a relatively simple structure.

  Further, the length (width) W1 of the operation arm 61 in the left-right direction is made longer than the length (width) W2 of the front cover 33 in the left-right direction, so that the space between the grip portion 62 of the operation arm 61 and the front cover 33 is increased. Even if the front-rear distance is reduced to shorten the overall length L1 of the vehicle body, the space between the grip portion 62 and the front cover 33 can be widened. The possibility of getting in the way can be avoided. Further, the operation arm 61 can effectively function as a protective frame that prevents contact with other objects such as a bag of the front cover 33.

  A vehicle body frame 64 is configured by the front axle case 5, the main frame 6, the transmission case 7, the support base 27, the operation arm 61, and the like that are coupled in the front-rear direction.

  As shown in FIG. 1, in this rice transplanter, the driver's seat 45 and the engine 8 are arranged on the front / rear center Pa of a vehicle body frame 64 having a front / rear length L2 extending from the front end of the operation arm 61 to the rear end of the transmission case 7. Further, the transmission case 7 and the fuel tank 46 are disposed on the front and rear center Pb of the vehicle body total length L1 from the front end of the traveling vehicle body 1 (front end of the operation arm 61) to the rear end of the seedling planting device 4 (rear end of the planting mechanism 24). In addition, as a rice transplanter, a plurality of spare seedling stands 56 are provided on the left and right extending portions 59 extending forward from the connecting portion 58 connected to the rear upper portion of the seat frame 44. While being able to reduce the size and improve the workability by expanding the front and lower field of view, when the driver is seated on the driver's seat 45, the weight of the driver is taken into consideration. A front-rear balance can be obtained, and when the driver guides the vehicle body using the operation arm 61 from the ground side, the driver moves away from the driver seat 45 so that the center of gravity of the vehicle body is appropriately rearward. Therefore, it is easy to perform the guidance operation of the vehicle body using the operation arm 61, in particular, the guidance operation with the front side of the vehicle body lifted.

  Further, since the engine 8 is separated from the operation arm 61, it is possible to suppress the deterioration of the operation environment due to the radiant heat and noise from the engine 8 during the guidance operation of the vehicle body using the operation arm 61.

  Furthermore, when the preliminary seedling stands 56 are positioned on the left and right sides of the driver seat 45, it is easy to get on and off the side of the traveling vehicle body 1 or from the front.

  As shown in FIGS. 1, 2, 5, and 7, the fuel tank 46 is integrally formed with a pair of protrusions 65 extending in the front-rear direction so as to sandwich a fuel supply portion 66 formed at the upper left portion thereof. A rearward leaning posture in which the refueling portion 66 faces rearward upward at a position behind the engine 8 that does not overlap with the engine 8 in plan view and at a relatively low position where the bottom portion overlaps with the top of the engine 8 in side view As a result, when the fuel tank 46 is disposed above the engine 8 while ensuring a water head difference with a carburetor (not shown), the driver seat 45 disposed above the engine 8 is generated. It is possible to avoid an increase in the center of gravity due to an increase in the height position and an increase in the center of gravity due to the fuel tank 46 being arranged at a high position not overlapping with the engine 8 in a side view. Qualitative improvement can be achieved, and even if gasoline is overflowing from the refueling section 66, it is an inexpensive configuration that only forms a pair of protrusions 65 integrally with the fuel tank 46. Gasoline can be prevented from flowing to the engine 8 side.

  As shown in FIGS. 1, 2, and 9 to 11, the rice transplanter is equipped with a balance weight 67 that can be attached to and detached from the operation arm 61. Compared with the case where the balance weight 67 is attached to the inside of the front cover 33, the bottom of the body frame 64, or the like, the measures against the increase in the rear weight due to the replacement of the work equipment with a large number of work strips or the heavy field work equipment. Therefore, the front-rear balance can be easily improved.

  In addition, since the operating arm 61 is fixedly installed at the front end of the traveling vehicle body 1, it is not necessary to reinforce the balance weight 67 in order to enable the attachment / detachment of the balance weight 67. Since the balance weight 67 is located at the most distant position on the front side, the balance function can be effectively exhibited while adopting a relatively light weight as the balance weight 67. Since a relatively light weight can be adopted as the balance weight 67, the weight of the entire vehicle body can be suppressed, and the operability of the vehicle body from the ground side using the operation arm 61 can be secured.

  The balance weight 67 can be attached to and detached from the operation arm 61 by engaging and disengaging the operation arm 61 with respect to the pair of left and right fitting recesses 68 formed on the left and right sides of the balance weight 67 so as to correspond to the operation arm 61 and the pair of left and right fitting recesses. This can be easily done by attaching / detaching the retaining bolt 69 to / from the balance weight 67 to prevent the operation arm 61 from being detached from the balance 68.

  As shown in FIGS. 1, 2, 9, and 12 to 14, brackets 70 are provided on the left and right ends of the front portion of the support base 27, and each of the brackets 70 has a vertical orientation for attaching an adjacent marker. A support shaft 71 is provided so as to be rotatable around its axis, and the support shaft 71 is fitted with a coil spring 72 that pushes and urges the support shaft 71 with respect to the bracket 70 on the upper portion thereof, and on the lower portion thereof. A through-hole 73 for inserting the adjacent marker is formed, and the base end portion 75 of the adjacent marker 74 is inserted into the through-hole 73 so that the pair of left and right adjacent markers 74 are supported on the front end portion of the traveling vehicle body 1. 71 can be swung back and forth around the axis of 71, can be swung up and down around the axis of the base end portion 75, and can be equipped to be able to hold friction in each swinging posture. Each adjacent marker 74 has a tip 76 that is outside the vehicle body. It can be easily switched and held between a lowering posture and a retracted posture in which the distal end portion 76 stands up in the vehicle body, and the position of the distal end portion 76 in the operational posture is determined by the distal end portion 76 sandwiching the front wheel 14. The maximum position (next to the position where the separation distance with respect to the adjacent seedlings that have been planted is maximized) positioned right next to the base end portion 75, and the front end portion 76 is positioned in front of the base end portion 75, on the outer surface side of the front wheel 14. It can be adjusted and maintained between the adjacent minimum positions (positions that minimize the separation distance with respect to the adjacent seedlings that have already been planted), and the distal end portion 76 can be locked to the operation arm 61 in the retracted posture. It has become.

  In addition, by receiving the proximal end portion 75 of the adjacent marker 74 at the front end of each bracket 70, the distal end portion 76 of the adjacent marker 74 is displaced rearward from the maximum position located directly beside the proximal end portion 75. The receiving portion 77 for blocking is bent downward, so that when the adjacent marker 74 is hooked on a hook or the like, the tip 76 is displaced rearward from the maximum position. The entanglement of the marker 74 on the front wheel 14 can be avoided.

  5 denotes a hydraulic pump that is driven by the power from the engine 8 that is transmitted through a transmission belt 79 provided in parallel with the main clutch 9.

[Another Example]
Other embodiments of the present invention will be listed below.
[1] The agricultural work vehicle may be a rice transplanter configured to be able to plant four or more rows, a rice transplanter additionally provided with a fertilizer, or a tractor or combine other than a rice transplanter.

[2] The arrangement of the driver seat 45 can be variously changed as long as the driver can sit in the driver seat 45 and obtain a good front-rear balance considering the weight of the driver. Due to the arrangement, when the driver guides the vehicle body from the ground side using the operation arm 61, the vehicle body guide operation using the operation arm 61 as the driver moves away from the driver seat 45, in particular, It is desirable to obtain a good front-rear balance that facilitates a guiding operation in which the front side of the vehicle body is lifted and made it feel like it is.

[3] As a mounting position of the engine 8, a position in which a good front-rear balance in consideration of the weight of the driver can be obtained and a driver's visibility can be secured when the driver is seated on the driver's seat 45. As long as the driver moves away from the driver seat 45 during the guidance operation in which the driver guides the vehicle body using the operation arm 61 from the ground side, various operations can be performed. It is desirable to obtain a good front-rear balance that facilitates the guidance operation of the vehicle body using the arm 61, particularly the guidance operation that lifts the front side of the vehicle body and makes it feel like it.

[4] The arrangement of the spare seedling support frame 57 can be variously changed as long as the driver can sit on the driver seat 45 and obtain a good front-rear balance in consideration of the weight of the driver. With this arrangement, when the driver guides the vehicle body from the ground side using the operation arm 61, the vehicle body guide operation using the operation arm 61 as the driver leaves the driver seat 45. In particular, it is desirable to obtain a good front-rear balance that facilitates a guiding operation in which the front side of the vehicle body is lifted and felt.

[5] The arrangement of the mission case 7 can be changed in various ways as long as the driver can sit in the driver's seat 45 and obtain a good front-rear balance in consideration of the weight of the driver. Due to the arrangement, when the driver guides the vehicle body from the ground side using the operation arm 61, the vehicle body guide operation using the operation arm 61 as the driver moves away from the driver seat 45, in particular, It is desirable to obtain a good front-rear balance that facilitates a guiding operation in which the front side of the vehicle body is lifted and made it feel like it is.

[6] The arrangement of the fuel tank 46 can be variously changed as long as the driver can sit on the driver's seat 45 and obtain a good front-rear balance considering the weight of the driver. Due to the arrangement, when the driver guides the vehicle body from the ground side using the operation arm 61, the vehicle body guide operation using the operation arm 61 as the driver moves away from the driver seat 45, in particular, It is desirable to obtain a good front-rear balance that facilitates a guiding operation in which the front side of the vehicle body is lifted and made it feel like it is.

[7] The body frame 64 may have a dedicated frame structure.

Overall side view of riding rice transplanter Overall plan view of riding rice transplanter Plan view of traveling system Longitudinal side view of the front of the vehicle body Vertical side view of the rear half of the vehicle body Perspective view of step and bonnet Rear view of main part showing configuration of spare seedling support frame and fuel tank Perspective view of spare seedling support frame Front view of main parts showing configuration of operation arm and adjacent marker Longitudinal rear view of the main part showing the attachment and detachment structure of the balance weight Cross-sectional plan view of the main part showing the attachment and detachment structure of the balance weight Longitudinal front view of main part showing support structure of adjacent marker Perspective view of main part showing support structure of adjacent marker Front view of the main part showing the storage posture of the adjacent marker

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Traveling vehicle body 4 Working apparatus 7 Mission case 8 Engine 13 Front axle 45 Driving seat 46 Fuel tank 56 Spare seedling stand 57 Spare seedling support frame 58 Connection part 59 Extension part 61 Operation arm 64 Body frame L1 Body full length Pa Front and back of body frame Center Pb Center of the entire body length

Claims (8)

  An agricultural work vehicle in which a working device is connected to a rear portion of a traveling vehicle body, and a driver's seat is provided on the front and rear center of the vehicle body frame in the traveling vehicle body.   An agricultural work vehicle in which a working device is connected to the rear portion of the traveling vehicle body, and an engine is disposed on the front and rear centers of the vehicle body frame in the traveling vehicle body.   Agricultural work in which a working device is connected to the rear part of the traveling vehicle body, and a spare seedling support frame provided with a spare seedling stand is provided in an extending part extending forward from the connecting part connected to the traveling vehicle body car.   An agricultural work vehicle in which a work device is connected to a rear portion of a traveling vehicle body, and a transmission case is arranged on the front and rear center of the entire vehicle body extending from the front end of the traveling vehicle body to the rear end of the working device.   An agricultural work vehicle in which a working device is connected to a rear portion of a traveling vehicle body, and a fuel tank is provided on the front and rear center of the entire vehicle body extending from the front end of the traveling vehicle body to the rear end of the working device.   A working device is connected to the rear portion of the traveling vehicle body, and a driver seat and an engine are arranged on the front and rear centers of the vehicle body frame in the traveling vehicle body, and the extension extending forward from the connection portion connected to the traveling vehicle body. A farm work vehicle in which a spare seedling support frame equipped with a spare seedling stand is provided at the exit, and a transmission case is provided on the front and rear centers of the entire length of the vehicle body extending from the front end of the traveling vehicle body to the rear end of the working device.   The agricultural work vehicle according to claim 1, 3, 4 or 5, wherein an engine is disposed behind the front axle of the traveling vehicle body and at a position not overlapping with the fuel tank in a plan view.   The agricultural work vehicle according to any one of claims 1 to 7, wherein an operation arm that enables guidance operation from the ground side of the traveling vehicle body is fixedly installed at a front end portion of the traveling vehicle body.

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